Measles is back in the U.S.
The cumulative number of measles cases across the U.S. in 2026 dwarfs the rate in most recent years.
A chart showing the cumulative cases of measles for each year between 2018 and 2026 so far. A red line denoting 2026 data rises faster and further up than all the other years, surpassing 4,000 cases by week 39. The next most severe increase was in 2025 with 2,286 yearly cases, followed by 2019 with 1,250 yearly cases. Most other years showed fewer than 500 cumulative cases.
